Roadway joint



July 14, 19125. 1,546,005

B. BRIODY ROADWAY JOINT- Filed Feb. 23. 1922 ,www

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v Y W@ Patented July 14, 1925c UNITED STATES PATENT oFFIcE.

BERNARD BRIODY, F CHICAGO, ILLINOIS, ABSIGNOR TO TRUSCO'N vSTEEL COINIPANY, OF YOUNGSTOWN, OHIO, A CORPORATION OF MICHIGAN.

ROADWAY JOINT.

Application illed February 28, 1922. Serial No. 538,54-8.

To all whom. z't maf/y concern.' Be it known that I, BERNARD BaionY, a

citizen of the United States, and residing at Chicago, in the count of' Cook and State of Illinois, have inven a new and Improved Roadway Joint, of which the following is a specification.

This invention relates to concrete roadways and especially to means for preventing the pavement from breaking along irregular lines substantially longitudinal y of the roadway, and its object is to provide means which will cause the roadway to crack along a central line longitudinally of the roadway when the stresses set up inthe concrete are greater than, can be resisted by the strength of the roadway..

This invention consists in a strip embedded vertically in, and extending longitudinally of a concrete roadway and being preferably of less depth than the concrete slab and having its upper edge a distance below the upper surface of the slab. It further consists in` longitudinally corrugating 95 the strip in order to provide for a ton eand-groove joint between the adjacent e ges of the two sections of the roadway slab. It also consists in reinforcing rods for the slabs 'extendin transversely of the roadway s0 through oles in the metal strip. It also consiste in the details of construction illustrated in the accomianying drawing and particularly pointe out in the claims. In the acoompaiying drawing, Fig. 1 is a 85 plan of a piece of roadway provided with my im roved contraction joint. Fig. 2 is a vertice. lon 'tudinal section of the central rar thereo Fig. 3 is a section on the line of Fig. 2 40 Similar reference characters refer to like parts throughout the several views.

The roadway 1 shown in the drawing ma have curbs 2, although these may be omitte It is formed b spreading a layer of concrete 3 over the su -base 4 in the usual manner'. Embedded in the concrete lon 'itudinally of the roadwa and preferably a on the middle thereo is a strip formed ro m sheet metal,paper, or other stili material with vertical portions 5, 6 and 7, and` inclined 50 portions 8 and 9. This corrugated stri is preferably in sections whose ends over ap, and these ends may be connected by one of the su portingl pins or stakes 10, which extend t rough oles in the portions 8 and 9 at intervals to position the strips. The strips are preferably of thin sheet steel.

This strip preferably extends up from the bottom of the concrete to within about one half inch from the finished u per surface thereof. Rods 12 are prefera 1y extended through holes in the middle portions, 6 of the corrugations or channels of these stri s at regular intervals and are embedded in t ie concrete to hold the two sides of the road- 05 way in proper relationto each other. If

vthere is any movement of the roadway by i nel is immaterial so long as the interlock is provided.

The-depth and thickness of the strip and the form of its corru ation may be varied as desiredpb those ski ed in the art without departing rom the s irit of my invention as set forth in the fol owing claims.

' I claim:

1. A concrete roadway, a channel-shaped strip of sheet metal embedded therein alon its middle line and formed with holes, an tension rods embedded in the concrete transversely to the roadway and passing through the holes in the strip.

2. A concrete roadway, a strip of metal embedded therein below the upper surface of the roadway, and tension ars passing through the strip into concrete on both sides of the stri the length of said bars being more than alf the width of the roadway.

-3. A roadway comprlsing two parts, joinsaid parts having a longitudinal groove in ing along the middle of the roadway, one of its inner edge and the other having a tongue 10 said parts havingalongitudinal channel and extending into said groove, a sheet metal the other'having a tongue extending into facing for said groove, androds extending said Channel, and metal .rods extending across the joint transversely of the roadway across the joint transversely of the roadway. thIOllgh Said Sheet metal.

4.- A roadway comprising two parts joining lalong the middle of the roadway, one of BERNARD BRIODY. 

